摘要
高墩曲线连续刚构桥上部结构由于受自重及预应力扭矩影响,极易产生较大的横向变形,不利于线形控制。通过改变墩身结构型式,对横向变形及竖向变形进行约束。通过建立采用不同斜坡率墩身的有限元模型,分析墩身斜坡率对横向变形的影响规律,得出最佳斜坡率为50∶1。分别对采用矩形薄壁墩及最佳斜坡率斜坡式矩形薄壁墩的曲线刚构桥建立有限元模型,对跨中竖向变形、横向变形进行数值分析,结果表明,斜坡式矩形薄壁墩设计能够较大程度地降低高墩曲线连续刚构桥跨中的竖向变形及横向变形,对线形控制有较好的效果。
Due to the influence of self-weight and prestressed torque,the continuous rigid structure bridge with high pier curve is prone to large transverse deformation,which is not conducive to linear control.In this paper,the transverse deformation and vertical deformation are constrained by changing the structure type of the pier.By establishing finite element models of curved rigid bridges using rectangular thin-walled piers and sloped rectangular thin-walled piers,the vertical deformation,lateral deformation and bending moment are numerically analyzed.It is concluded that the slope-type rectangular thin-walled piers can greatly reduce the vertical deformation and lateral deformation of the continuous rigid bridge of the high pier curve,and have a good effect on linear control.It provides preliminary theoretical support for the application of sloped rectangular thin-walled piers to continuous rigid bridges with high pier curves.
作者
庞千翔
李红
张霖波
PANG Qian-xiang;LI Hong;ZHANG Lin-bo(School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China)
出处
《武汉理工大学学报》
CAS
2023年第11期79-85,共7页
Journal of Wuhan University of Technology
关键词
曲线连续刚构
高墩
斜坡式薄壁墩
竖向变形
横向变形
continuous rigid structure of curves
high piers
sloping thin-walled pier
vertical deformation
lateral deformation
